92 lines
2.2 KiB
C++
92 lines
2.2 KiB
C++
// Copyright (C) 2020 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Renderer module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SHADER_LANGPARSER_HPP
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#define NAZARA_SHADER_LANGPARSER_HPP
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#include <Nazara/Prerequisites.hpp>
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#include <Nazara/Shader/Config.hpp>
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#include <Nazara/Shader/ShaderLangLexer.hpp>
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#include <Nazara/Shader/ShaderAst.hpp>
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namespace Nz::ShaderLang
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{
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class ExpectedToken : public std::exception
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{
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public:
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using exception::exception;
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};
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class ReservedKeyword : public std::exception
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{
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public:
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using exception::exception;
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};
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class UnknownType : public std::exception
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{
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public:
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using exception::exception;
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};
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class UnexpectedToken : public std::exception
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{
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public:
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using exception::exception;
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};
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class NAZARA_SHADER_API Parser
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{
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public:
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inline Parser();
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~Parser() = default;
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ShaderAst Parse(const std::vector<Token>& tokens);
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private:
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// Flow control
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const Token& Advance();
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void Expect(const Token& token, TokenType type);
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const Token& ExpectNext(TokenType type);
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const Token& PeekNext();
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// Statements
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ShaderNodes::StatementPtr ParseFunctionBody();
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void ParseFunctionDeclaration();
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ShaderAst::FunctionParameter ParseFunctionParameter();
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ShaderNodes::StatementPtr ParseReturnStatement();
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ShaderNodes::StatementPtr ParseStatement();
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ShaderNodes::StatementPtr ParseStatementList();
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// Expressions
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ShaderNodes::ExpressionPtr ParseBinOpRhs(int exprPrecedence, ShaderNodes::ExpressionPtr lhs);
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ShaderNodes::ExpressionPtr ParseExpression();
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ShaderNodes::ExpressionPtr ParseIdentifier();
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ShaderNodes::ExpressionPtr ParseIntegerExpression();
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ShaderNodes::ExpressionPtr ParseParenthesisExpression();
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ShaderNodes::ExpressionPtr ParsePrimaryExpression();
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std::string ParseIdentifierAsName();
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ShaderExpressionType ParseIdentifierAsType();
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static int GetTokenPrecedence(TokenType token);
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struct Context
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{
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ShaderAst result;
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std::size_t tokenCount;
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std::size_t tokenIndex = 0;
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const Token* tokens;
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};
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Context* m_context;
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};
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}
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#include <Nazara/Shader/ShaderLangParser.inl>
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#endif
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